Fig. 3From: Pancreaticoduodenectomy following total occlusion of the superior mesenteric artery: a case report and literature reviewSuperior mesenteric artery occlusion and SMA-IMA anastomosis. a Superior mesenteric artery occlusion was seen before surgery (yellow arrow). b Dilation of SMA and IMA branches before surgery. c Arc of Riolan development observed on postoperative day 98. d Arc of Riolan development observed on postoperative day 307Back to article page